semantic error
Học thuậtThân thiện
Definition
Noun: A semantic error is a type of programming or logical mistake where the syntax of the code is correct, so it runs without crashing, but it produces an incorrect or unintended result because the meaning or logic of the instructions is flawed. It is an error in the program's logic or arithmetic that becomes apparent only when the program is executed (at run time).
Usage
This term is used primarily in computer science and software development to describe a specific category of programming bugs. - It is contrasted with syntax errors (which prevent code from running) and runtime errors (which cause a program to crash during execution). - Semantic errors are often more difficult to find and fix because the program runs but behaves incorrectly.
Examples
- In Programming:
- The function had a semantic error: it calculated the average by dividing by the wrong variable, so the output was always wrong.
- Using the assignment operator
=instead of the comparison operator==in a conditional statement is a classic semantic error.
- General Logic:
- His argument contained a semantic error; the conclusion did not logically follow from the premises, even though the sentences were grammatically correct.
Advanced Usage
- "to introduce a semantic error": to write code that contains this type of logical mistake.
- Refactoring the code carelessly can introduce a semantic error that is hard to trace.
- "to track down a semantic error": to debug and find the source of a logical flaw.
- It took hours to track down the semantic error causing the financial report totals to be off.
Variants and Related Words
- Logic error (n): A synonym for semantic error, emphasizing the flaw in the program's reasoning.
- Bug (n): A general term for any error, flaw, or fault in a computer program.
- Debugging (n): The process of finding and resolving bugs or defects in a program.
Synonyms
- Logic error
- Logical bug
Related Concepts (Not Phrasal Verbs or Idioms)
- Syntax Error: An error in the code structure that violates the rules of the programming language, preventing execution.
- Runtime Error: An error that occurs during the execution of a program, often causing it to abort.
- Off-by-one error: A common type of semantic error where a loop or counter is incorrectly bounded by one.
Noun
- an error in logic or arithmetic that must be detected at run time